| 摘要 |
<p>In a device for contra-rotating two concentric shafts, one of which is hollow in order to accommodate the other, by means of at least one drive shaft which is connected to a power source, said concentric shafts are connected to each other by means of a geared transmission. The geared transmission comprises a double right-angle transmission formed by one or more crown wheels meshing with cylindrical pinions.</p> |
